I'm also a stickler, very particular about packing methods for most stuff. I'm a BIG FAN of the hard styrofoam board insulation, sold by Home Depot, Lowes and the like. GREAT material. I've never had an item damaged, that was in at least 1 inch thick layer of this stuff..
Of course, by "layer"... I mean FULL 360-degree, all-sides, no holes COVERAGE of the item by the foam board. I basically "brick in" the item with the board sheets, until it CANNOT MOVE in the box.
I tend not to splurge for E-paks, in most cases... I've found, once you "rigidize" a box with styrofoam sheets, and thoroughly tape ALL the seams, edges and corners with a couple layers of packing tape, NOTHING is going to cause it much damage.
Here's an example of my packing, taken by someone who received the enclosed Crown IC150 from me. This is typical of how I've kept MANY things out of trouble...